It\'s a nice model, although it\'s not really fox-like.
IMO it should be skinnier, especially on the waist. Foxes are carnivores, carnivores have a shorter digestive system than herbivores (has to do with some of the properties of plant cells, don\'t know the name in english). Therefore herbivores have big waistes (think cow), but carnivores are very skinny at their wastes (think dog, or fox).
Furthermore, it lacks a neck. Foxes arent that solid and muscular. Maybe the legs could be a bit longer as well, but I\'m not sure on that.
So all in all I think it should be skinnier at some points. If you try this, please post the results.